SITE INFORMATION AND CORRESPONDENCE

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California Regbional Water Quality �ontro 1 Board _ Central Valley Region Steven T.Butler,Chair Winston H. Hickox Gray Davis Secretary for Sacramento Main Office Governor Environmental Internet Address: http://w�%-A.s%vreb.ca.gov/—rwgcb5 Protection 3443 Routier Road,Suite A.Sacramento,Califomia 95827-3003 Phone(916)'_55-3000•FAX(916)255-3015 8 February 2000 Mr. Doug Stidham, City Engineer City of Escalon 1854 Main Street Escalon, CA 95320 NOTICE OF VIOLATION CITY OF ESCALON H ASTERATER TREATMENT PLANT, SAN JOA QUIN COUNTY Enclosed is a report summarizing staff's recent inspection of your facility. The site inspection was performed at the City of Escalon wastewater treatment plant (WWTP) on 27 January 2000. In general, the wastewater treatment plant was clean and well maintained; however, violations of the waste discharge requirements (WDRs) were observed. A site inspection photograph log is enclosed with this letter. The City is in the process of improving the industrial pipeline, and is also planning to construct improvements to increase the wastewater flow capacity and provide additional aeration of industrial wastewater ponds at the WWTP. The industrial treatment ponds will be reconfigured as part of the improvements. The location of the industrial ponds will not change; however, ponds not previously used are anticipated to be utilized. Distribution piping changes will be part of the industrial WWTP's improvements. The City is also proposing to reconfigure the existing domestic disposal ponds. In general, the modifications proposed consist of combining adjacent ponds by removing dikes separating the ponds. In addition, Pond 20 will be combined with Pond 12 and an adjacent area. Piping changes will also be part of the domestic WWTP's improvements. The following observations of the WWTP were noted during the inspection: • Industrial wastewater and storm water drainage is delivered to the WWTP in a pipeline separate from the domestic wastewater flow. The industrial pipeline carries stormwater during rain events. At the time of the site inspection, surface water drainage was being discharged by the pipeline. • The pond freeboard in the industrial treatment and disposal ponds was acceptable, except as noted below. • Minor odors were noted in the immediate vicinity of the north end of Pond No. 3. • Some of the surface aerators were operating during the site inspection. • Duckweed was observed on Pond No. 7. California Environmental Protection Agency C:V'..Iri FlbtineLLi.n4niti,WSnoA]WW.IIOC �a Recycled Paper